Profiling milling cutter



,milling profiles,etc.

Patented Sept. 3, 1946 UNITED STATES PATENT Y OFFICE rRoFnmGMILLING CUTTER Alois Kutscha, Chicago, Ill. .Application vApril '122, 1943, Serial No.484,016

.5 Claimsj (ci. 29-105) v .1 l y Y The present invention relates to a milling cutter assembly having a plurality Iof .spaced arms each adapted -tc carry abutting blade er bit for Each blade Fer -bt 'is .mount- .ed in position to -mill longitudinally and radially of the .axis of the cutter head to ,thereby most eiectively mill profiles or to'recess a castingor other work.

lIhe invention further fcomprehends a novel means and manner of adjusting each :cutter bit .or blade within its mounting to :assure foptimum `cutting .eiect and toinsure or Ypermit .most effective use .of athe bits Yor blades and .for 'a .maximum period. Itwill -be readily appreciated from 'the illustrative :embodiment of cutter vhead herein disclosed .that lthe spaced arms ,or projections are -so constructed and arranged as to reffect a considerable saving in metal over prior types .of heads, :and that 4they novel construction `of cutter ybits -or blades is Asuchas to alsoallow for an appreciable :saving inthe high grade 4tool steel necessary .for Atheir `cutting edges lor rsurfaces. Forexampla the body .of f each 3bit -orfblade may be of :a relativelycheapmetal with-only the cutting edges of a high grade tool steel.

Further objects are to provide a construction .of maximum simplicity, efficiency, economy and ea-se of assembly fand operation, and such 'further objects, advantages and-.capabilities as `will vlater more fully Vappear and ;ar e .inherently possessed thereby.

The 'invention further .resides inthe construction, `combination 'and yarrangement y'of parts illustrated 'in the :accompanying drawing, and while there iis vshown therein a `preferred embodiment, 'it is .to be understood `that the same is nsusceptible .of modification and `change, `and comprehends other :.details, arrangements of parts, features and l-cofnstructions vwithout .departing from the spirit fof the invention.

In vthe drawing:

.Figure 1 :is :a view perspective nf zthe .novel :cutter :assembly shown in lpositinner 'milling and profiling a recess in an object for roasting.

Figure .2 'isa View .in side elevation of the cutter head assembly but with several of the arms removed to more clearly show the manner of attaching the cutter tool or head to the shaft.

Figure 3 is a top plan view of the cutter head assembly.

Figure 4 is an enlarged fragmentary view in horizontal cross-section through the mounting or support for a cutter blade or bit and taken on the line 4 4 of Figure 2.

Figure 5 is a View similar to Figure 4 but showing the position of the cutter blade ror bit 'within its `mounting after `it has become worn vandresharpened.

Figiure -6 a view-'showing in .-front elevation an illustrative embodiment of .acutter bit or blade, the `initial positionof this -cutter .blade -or bit and the novel manner of mounting :it being shown in dotted outline, and .subsequently ad justed -position of the'rzblade `being shownzin Kfull outline. v 1 f Referring more particularly to the embodiv Q3 land with the outer surface of this VAprojection which may be preferably tapered fat 6 and :provided three openings Tl .sui-tablyspaced apart fand arranged Tin triangular formation 'for ithe refception Y.ef' locking bolts 8 lcarried in similarly arranged recesses Yor `.openings :in a locking -plate A9.l

Each cutter -bit or blade is preferably Yprovided `with ve lopenings =|0 with 'three vof these Aopen-- yings 'spaced -in the same Vmanner as .the openings in the locking plate v9 and projection 2 -for'the reception of the Ylocking bolts and whereby Yeach :bit Ior blade is rigidly anchored and Ylocked in .posi-tion for operation upon'a Acasting or other Work.

As shown 4in Figure 6, each .blade may be Iof substantially triangular shape 1and provided with `cutting edges Vor surfaces vIleand Ylf2 whereby to milla profile such -as in the surface I3 and 'under-cut -I4 of a casting-orotherobject I-5 upon which the milling cutter is operating. -Due .-t'o thefact that the cutting vbit or blade `isof a high :grade steel, it :is highly important that it be lemployed to its maximum efficiency. This is contemplated :and .the present invention permits ythe surfaces Il and `I2 to be sharpened whenever that becomes necessary.

As shown in Figure 4, when a new cutting blade 3 is inserted into the cutter head or holder with its inner edge abutting the shoulder or rearward abutment of the recess, the three locking bolts 8 project through the aligned openings l0 in the blade or bit 3 and lock this blade rigidly in position. Whenever the surfaces Il and I2 become suiciently Worn, the blade may be removed and sharpened along surfaces substantially parallel with those of Il and I2 and then again inserted into the holder as shown in Figure 5. At such time, the blade being of less dimensions than when new or initially applied, two of the locking bolts 8 in the plate 9 are projected through the other two openings l in the bit or blade and the third locking bolt 8 in the plate engages the rear surface or inner edge of the bit or blade and provides an abutment for preventing retraction and rigidly holding each bit or blade in position, as more clearly shown in Figure 5. Thus, the purpose of each of the ve openings to allow for this dual adjustment, will be appreciated.

The cutter head or cutting tool may be mounted upon the shaft 4 by any suitable means. As shown in Figure 2, the upper and lower surface of the head maybe recessed or counterbored at I6 and` I1, respectively, and provided with a tapered opening I8 for receiving the reduced end of the shaft. The recess I6 is adapted to receive a collar or enlargement on the shaft and the recess or counterbore I1 receive a lock nut or other means for locking the head to the threaded, reduced end of the shaft 4.

It will be readily appreciated that the cutter head is so designed and constructed that the bits or blades need not be of the shape or contour or purpose of the bits or blades 3 as therein shown, but other forms of bit, blades or tools with or without ttings or adapters, may be interchangeable therewith for the purpose desired, such for example as end cutters or milling blades, etc.

Having thus disclosed my invention, I claim:

1. A cutting tool for a milling machine comprising a cutter head having a plurality of outwardly extending projections, one side of each projection being recessed for the reception of a cutting bit and provided with a shoulder, a cutting bit mounted within the recess and having substantially the shape of a right-angle triangle with the base and hypotenuse provided with cutting edges and the other side seating against the shoulder, a plate for anchoring and retaining the cutting bit within the recess and projection, spaced locking bolts carried by the plate and received in spaced aligned openings in the cutting bit and projection, and other openings provided in the cutting bit to be aligned with and receive certain of the locking bolts for permitting the bit to be adjusted to another position when the initial cutting surfaces thereof become worn, one of the locking bolts providing an abutment against which the rear of the bit seats when in the latter adjustedY position.

2. A cutting tool for a machine for milling proiiles comprising a cutter head having spaced outwardly extending projections each to mount a cutting bit, one side of each projection recessed for a greater portion of its length and provided with a shoulder, a cutting bit having substantially the shape of a right angle triangle with the base and hypotenuse provided with milling surfaces and its other side abutting against the shoulder, a retaining plate substantially conforming to the shape of the recess and provided with a plurality of spaced locking bolts passing through aligned openings in the bit and anchored in aligned openings in the projection, and additional openings in the bit for receiving certain of the locking bolts and mounting the bit outwardly of its initial position and in which position one of the bolts provides an abutment for the rear edge of the blade.

3. A cutting tool for a machine for milling proiiles comprising a cutter head having spaced outwardly extending projections each to mount a vcutting bit, one side of each projection recessed for a greater portion of its length and provided with a shoulder, a cutting bit having two of its edges exposed for milling purposes and another edge abutting against the shoulder, a retaining plate for anchoring and retaining the cutting bit within the recess and projection and against the shoulder, spaced locking bolts carried by the plate and received in spaced aligned openings in the cutting bit and projection, and other openings provided in the cutting bit to be aligned with and receive certain of the locking bolts for permitting the bit to be adjusted to another position away from the shoulder when the initial cutting surfaces thereof become worn, and means providing an abutment for the rear of the bit in this latter position.

4. A cutting tool for a machine for milling profiles in a metal casting comprising a cutter head having spaced outwardly extending projections each to mount a cutting bit, one side of each projection recessed for a greater portion of its length and provided with a shoulder, a cutting bit mounted in the recess and having its cutting surface exposed and the rear edge of the bit abutting the shoulder to prevent inward movement of the bit. a removable retaining plate substantially conforming to the shape of the recess and provided with spaced locking bolts arranged in triangular formation and carried in the retaining plate and to be received in aligned openings in the bit and projection for rigidly locking the bit against shifting from its predetermined position.

5. A milling cutter assembly for milling profiles, comprising a cutter head having a plurality of spaced projections, one side of each of the projections being recessed axially and provided with a shoulder, a cutting blade of substantially triangular formation to be received in each recess and provided with milling surfaces at two of its sides and with its other side abutting the shoulder, a plate for retaining each blade in position, locking members carried in each plate and projecting through aligned openings in each blade and received in aligned threaded openings in each arm, additional openings provided in each blade and spaced from the rst mentioned openings for anchoring the blade in another position to permit the blades to be re-sharpened and reused, and an abutment against which the rear of the blade abuts in this latter position.

- ALOIS KUTSCI-IA. 

